Update from hummingbird-project-template e9eae39c0a5fff1b127f751ff4e166635a2e34ee (#67)

Co-authored-by: adam-fowler <adam-fowler@users.noreply.github.com>

.github/workflows/ci.yml

@@ -39,7 +39,7 @@ jobs:
     timeout-minutes: 15
     strategy:
       matrix:
-        image: ["swift:5.9", "swift:5.10", "swift:6.0", "swiftlang/swift:nightly-6.1-jammy"]
+        image: ["swift:5.10", "swift:6.0", "swift:6.1"]
     container:
       image: ${{ matrix.image }}
     steps:
@@ -64,7 +64,7 @@ jobs:
     runs-on: windows-latest
     strategy:
       matrix:
-        swift-version: ["6.0"]
+        swift-version: ["6.1"]
     steps:
       - uses: compnerd/gha-setup-swift@main
         with: